阅读说明：本技术 喷枪阀芯总成及无气手动喷枪 (Spray gun valve core assembly and airless manual spray gun ) 是由 陈铁军 于 2021-09-23 设计创作，主要内容包括：本发明公开了一种喷枪阀芯总成及无气手动喷枪,包括阀芯、压套、蓄能式密封圈和导向顶套,所述阀芯的右端小径段与阶梯孔的小径孔螺纹连接,所述阀芯的右端大径段外圆面与阶梯孔大径孔内圆面适形贴合,所述压套用于连接于枪体上并轴向向左压紧蓄能式密封圈,使得蓄能式密封圈密封于枪体与阀芯径向间；所述无气手动喷枪中安装有上述所述的喷枪阀芯总成。本发明中阀芯螺纹连接处的左侧通过阶梯孔的大径孔形成支撑和导向,可保证阀芯螺纹连接处的稳定性,基于阀芯稳定性的前提下,使得阀芯与蓄能式密封圈之间形成了良好的配合关系,可避免由于阀芯折断或者形变导致阀芯与蓄能式密封圈之间配合失效的现象,提高了阀芯整体的密封性能。(The invention discloses a spray gun valve core assembly and an airless manual spray gun, which comprise a valve core, a pressing sleeve, an energy storage type sealing ring and a guide top sleeve, wherein a small-diameter section at the right end of the valve core is in threaded connection with a small-diameter hole of a stepped hole, an outer circular surface of a large-diameter section at the right end of the valve core is in conformal fit with an inner circular surface of the large-diameter hole of the stepped hole, and the pressing sleeve is used for being connected to a gun body and axially pressing the energy storage type sealing ring leftwards so that the energy storage type sealing ring is sealed between the gun body and the valve core in the radial direction; the airless manual spray gun is internally provided with the spray gun valve core assembly. According to the invention, the left side of the threaded connection part of the valve core forms support and guide through the large-diameter hole of the stepped hole, so that the stability of the threaded connection part of the valve core can be ensured, a good matching relation is formed between the valve core and the energy storage type sealing ring on the premise of valve core stability, the phenomenon of matching failure between the valve core and the energy storage type sealing ring due to breakage or deformation of the valve core can be avoided, and the integral sealing performance of the valve core is improved.)

1. A spray gun case assembly which characterized in that: the energy storage type sealing device comprises a valve core, a pressing sleeve, an energy storage type sealing ring and a guide top sleeve, wherein the right end part of the valve core is in a stepped shaft shape, a stepped hole matched with the right end of the valve core is formed in the guide top sleeve, a small diameter section of the right end of the valve core is in threaded connection with a small diameter hole of the stepped hole, the outer circular surface of a large diameter section of the right end of the valve core is in shape-fitted fit with the inner circular surface of the large diameter hole of the stepped hole, the energy storage type sealing ring is sleeved on the valve core and located on the left side of the guide top sleeve, the pressing sleeve is sleeved on the valve core and located between the guide top sleeve and the energy storage type sealing ring, and the pressing sleeve is used for being connected to a gun body and axially compressing the energy storage type sealing ring leftwards, so that the energy storage type sealing ring is sealed between the gun body and the radial direction of the valve core.

2. The spray gun valve cartridge assembly of claim 1, wherein: the left end of the guide top sleeve is in an opening shape, and the guide top sleeve is sleeved on the pressing sleeve in an axially sliding mode.

3. The spray gun valve cartridge assembly of claim 1, wherein: the pressure sleeve is of a left end opening structure, and the energy storage type sealing rings are arranged in a plurality and are axially pressed in the inner cavity of the pressure sleeve.

4. The spray gun valve cartridge assembly of claim 3, wherein: the energy-storage type sealing device is characterized by further comprising an end face sealing ring, the end face sealing ring is sleeved on the valve core and located at the left end of the pressing sleeve, the left end of the pressing sleeve axially presses the end face sealing ring leftwards on the gun body to enable the end face sealing ring to be sealed between the tooth socket and the gun body in the axial direction, and the end face sealing ring axially extrudes the energy-storage type sealing ring.

5. The spray gun valve cartridge assembly of claim 1, wherein: the valve core comprises a gun needle and a sealing ball connected to the left end of the gun needle, a flow passage is formed in the valve seat, the sealing ball slides axially along with the gun needle to seal or open the right end of the flow passage, and a flow dividing pin is radially arranged in the flow passage.

6. The spray gun valve cartridge assembly of claim 4, wherein: and the outer circular surface of the pressing sleeve is provided with an external thread close to the left end for being in threaded connection with the gun body.

7. The spray gun valve cartridge assembly of claim 2, wherein: the outer circle surface of the pressing sleeve is of a stepped shaft structure with a large left and a small right, the large-diameter section of the pressing sleeve is provided with an external thread used for being in threaded connection with the gun body, and the guide jacking sleeve slides axially and is sleeved on the small-diameter section of the pressing sleeve.

8. The spray gun valve cartridge assembly of claim 7, wherein: the left end of the guide top sleeve is provided with a flange extending outwards in the radial direction.

9. The utility model provides an airless manual spray gun which characterized in that: the airless manual spray gun is provided with a spray gun valve core assembly as defined in any one of claims 1 to 8.

Technical Field

The invention relates to the technical field of coating, in particular to a spray gun valve core assembly and an airless manual spray gun.

Background

The sealing structure of the valve core in the airless manual spray gun has great influence on the overall performance of the spray gun, the sealing part of the valve core of the existing spray gun usually adopts a mode of combining a sealing ring with a nut for pressing, and the valve core is directly screwed on a guide top plate, because the length of the valve core is longer, the valve core is easy to shake in the running process of the valve core, and the threaded connection part of the valve core is easy to bend or break due to stress concentration, so that the valve core is unstable, the matching failure of the valve core and the sealing ring is further caused, the abrasion of the sealing ring is increased or the gap at the sealing surface is enlarged, and the sealing structure has no self-compensation capability, so that the leakage of the sealing part is caused;

therefore, a spray gun valve core assembly and an airless manual spray gun are needed, the valve core is high in stability and good in matching stability with a sealing ring, the sealing ring has a self-compensation function, a good sealing effect can be achieved, and the service life of a sealing structure is prolonged.

Disclosure of Invention

In view of the above, the invention provides a spray gun valve core assembly and an airless manual spray gun, the valve core has high stability, good matching stability with a sealing ring, and the sealing ring has a self-compensation function, so that a good sealing effect can be achieved, and the service life of the sealing structure is prolonged.

The invention relates to a spray gun valve core assembly and an airless manual spray gun, which comprise a valve core, a pressing sleeve, an energy storage type sealing ring and a guide top sleeve, wherein the right end part of the valve core is in a stepped shaft shape, a stepped hole matched with the right end of the valve core is formed in the guide top sleeve, the small diameter section of the right end of the valve core is in threaded connection with the small diameter hole of the stepped hole, the outer circular surface of the large diameter section of the right end of the valve core is matched with the inner circular surface of the large diameter hole of the stepped hole in a shape, the energy storage type sealing ring is sleeved on the valve core and positioned on the left side of the guide top sleeve, the pressing sleeve is sleeved on the valve core and positioned between the guide top sleeve and the energy storage type sealing ring, and the pressing sleeve is used for being connected on a gun body and axially pressing the energy storage type sealing ring leftwards so that the energy storage type sealing ring is sealed between the gun body and the valve core in the radial direction.

Furthermore, the left end of the guide top sleeve is in an opening shape, and the guide top sleeve is sleeved on the pressing sleeve in an axially sliding mode.

Furthermore, the pressure sleeve is of a left end opening structure, and the energy storage type sealing rings are provided with a plurality of sealing rings and are axially pressed in the inner cavity of the pressure sleeve.

The energy storage type sealing device is characterized by further comprising an end face sealing ring, the end face sealing ring is sleeved on the valve core and located at the left end of the pressing sleeve, the left end of the pressing sleeve axially presses the end face sealing ring leftwards on the gun body, and the end face sealing ring axially extrudes the energy storage type sealing ring.

The valve core comprises a gun needle and a sealing ball connected to the left end of the gun needle, a flow passage is formed in the valve seat, the sealing ball is in sealing fit with the right end of the flow passage, and a flow dividing pin is radially arranged in the flow passage.

Further, the outer circular surface of the pressing sleeve is provided with an external thread near the left end for being in threaded connection with the gun body.

Further, the outer circle face of the pressing sleeve is of a stepped shaft structure with a large left side and a small right side, the large-diameter section of the pressing sleeve is provided with an external thread used for being in threaded connection with the gun body, and the guide jacking sleeve slides axially and is sleeved on the small-diameter section of the pressing sleeve.

Further, the guide top sleeve is provided with a flange extending outwards in the radial direction at the left end.

The invention also provides an airless manual spray gun, and the spray gun valve core assembly is installed in the airless manual spray gun.

The invention has the beneficial effects that:

according to the invention, the left side of the threaded connection part of the valve core forms support and guide through the large-diameter hole of the stepped hole, so that even if the valve core is stressed and shaken, the stability of the threaded connection part of the valve core can be ensured, further, the stress concentration of the threaded connection part caused by shaking of the valve core is reduced, and the risk of breaking or bending of the valve core is improved; on the premise of valve core stability, a good matching relation is formed between the valve core and the energy storage type sealing ring, the phenomenon that the matching between the valve core and the energy storage type sealing ring fails due to the fact that the valve core is broken or deformed can be avoided, the overall sealing performance of the valve core is improved, the energy storage type sealing ring also has a self-compensation function, the gap caused by compensation abrasion is facilitated, and the effective sealing life of a sealing piece can be prolonged.

Drawings

The invention is further described below with reference to the figures and examples.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a valve cartridge;

FIG. 3 is a schematic view of a spray gun;

Detailed Description

As shown in the figure, the embodiment provides a spray gun valve core assembly and an airless manual spray gun, which comprises a valve core 1, a pressing sleeve 2, an energy storage type sealing ring 3 and a guide top sleeve 4, wherein the right end part of the valve core is in a stepped shaft shape, a stepped hole matched with the right end of the valve core is formed in the guide top sleeve 4, a small-diameter section of the right end of the valve core is in threaded connection with the small-diameter hole of the stepped hole, the outer circular surface of a large-diameter section of the right end of the valve core is matched with the inner circular surface of the large-diameter hole of the stepped hole in a shape, the energy storage type sealing ring is sleeved on the valve core and positioned on the left side of the guide top sleeve, the pressing sleeve 2 is sleeved on the valve core and positioned between the guide top sleeve and the energy storage type sealing ring, and the pressing sleeve is used for being connected to a gun body and pressing the energy storage type sealing ring leftwards in an axial direction between the gun body and the valve core.

Referring to fig. 1, the right end of the valve core corresponds to the tail of the valve core, and the left end of the valve core corresponds to the head of the valve core, i.e., the sealing end of the valve core; the energy storage type sealing ring can adopt single-piston energy storage, namely a sealing ring, a double-piston energy storage type sealing ring or other known structural forms, the pressing sleeve 2 is connected to the gun body in a threaded manner, and the pressing sleeve axially compresses the energy storage type sealing ring, so that the sealing ring is radially sealed between the valve core and the gun body; the large-diameter section at the right end of the valve core is of a smooth cylindrical structure, the large-diameter hole of the stepped hole is a smooth cylindrical hole, and the outer diameter of the large-diameter section at the right end of the valve core is the same as the inner diameter of the large-diameter hole of the stepped hole; the small-diameter section of the right end of the valve core is in threaded connection with the small-diameter hole of the stepped hole and extends out of the guide top sleeve rightwards to be locked through the nut, the left side of the threaded connection part of the valve core is supported and guided through the large-diameter hole of the stepped hole by the structure, and even if the valve core is stressed and shakes, the stability of the threaded connection part of the valve core can be ensured, so that the stress concentration of the threaded connection part caused by shaking of the valve core is reduced, and the risk of breaking or bending of the valve core is improved; on the premise of valve core stability, a good matching relation is formed between the valve core and the energy storage type sealing ring, the phenomenon that the matching between the valve core and the energy storage type sealing ring fails due to the fact that the valve core is broken or deformed can be avoided, the overall sealing performance of the valve core is improved, the energy storage type sealing ring also has a self-compensation function, the gap caused by compensation abrasion is facilitated, and the effective sealing life of a sealing piece can be prolonged.

In this embodiment, the left end of the guide top sleeve 4 is open, and the guide top sleeve 4 is sleeved on the pressing sleeve 2 in an axially sliding manner. As shown in the combined drawing 1, the guide top sleeve is sleeved on the pressure sleeve 2, so that the guide top sleeve and the pressure sleeve are coaxially arranged, the stability of the valve core is further improved, the stability of the valve core and the stability of the energy storage type sealing ring 3 are further guaranteed, the pressure sleeve also plays a role in supporting and guiding the valve core, and the stability of the valve core close to the right end position is further improved.

In this embodiment, the pressing sleeve 2 is of a structure with an opening at the left end, and the energy storage type sealing rings 3 are provided with a plurality of sealing rings and are axially pressed in the inner cavity of the pressing sleeve 2. The mode is favorable for the installation of each energy storage type sealing ring 3, the extrusion effect on the sealing ring can be effectively improved, and the sealing performance is improved.

In this embodiment, the energy storage type sealing device further comprises an end face sealing ring 5, the end face sealing ring 5 is sleeved on the valve core and located at the left end of the pressing sleeve 2, the left end of the pressing sleeve 2 axially presses the end face sealing ring 5 leftwards on the gun body, and the end face sealing ring 5 axially extrudes the energy storage type sealing ring 3. Through the combined sealing structure of the end face sealing ring and the energy storage sealing ring, effective sealing is formed between the left end face of the pressing sleeve and the axial direction of the gun body and between the valve core and the radial direction of the pressing sleeve.

In this embodiment, still include disk seat 6, case 1 includes rifle needle 1a and connects in the ball sealer 1b of rifle needle left end, the runner has been seted up on the disk seat, the ball sealer with runner right-hand member seal cooperation, radially be provided with reposition of redundant personnel round pin 13 in the runner. The gun needle is usually made by high strength stainless steel spring steel wire, and the ball sealer adopts the welding high rigidity standard alloy ball, still has square case head 1c between gun needle and ball sealer, and square case head moves back when the case moves back right along with the case, can block into the rifle body waist type hole, does benefit to the dismouting of case, sets up the reposition of redundant personnel round pin in the runner on the disk seat in addition for reduce the impact wear to the nozzle.

In this embodiment, the outer circular surface of the pressing sleeve near the left end has an external thread for being connected with the gun body in a threaded manner. As shown in fig. 1, the pressing sleeve is internally connected in a threaded hole corresponding to the gun body to improve the stability of the pressing sleeve, and the guide top sleeve 4 is sleeved at the right end of the pressing sleeve, so that the pressing sleeve and the guide top sleeve are positioned in the radial direction and form two guide supports for the gun needle.

In this embodiment, the outer circle face of the pressing sleeve is of a stepped shaft structure with a large left and a small right, the large-diameter section of the pressing sleeve is provided with an external thread used for being in threaded connection with the gun body, and the guide top sleeve 4 is sleeved on the small-diameter section of the pressing sleeve 2 in an axially sliding manner. The structure is favorable for the overall spatial layout of the pressing sleeve and the guide top sleeve, and the compactness and the stability of the structure of the pressing sleeve and the guide top sleeve are improved.

In this embodiment, the guide sleeve 4 has a flange 4a extending radially outward at the left end. As shown in fig. 1, the flange is used to cooperate with a spring 7, the spring is sleeved on the guide top sleeve, the left end of the spring is supported on the flange of the guide top sleeve, and the right end of the spring is supported on the inner side of the gun body and is used for providing an axial leftward elastic force for the valve core.

The embodiment also provides an airless manual spray gun, wherein the spray gun valve core assembly is arranged in the airless manual spray gun. Referring to fig. 3, the airless manual spray gun further comprises a trigger 8, a split gun body 9, a handle 10, a rotary joint 11, a gun barrel 12 and other structures, wherein the hand holding part of the trigger 8 is of an arc structure, so that the manual spray gun is more in line with ergonomics and reduces the operation fatigue; the split type gun body 9 adopts an aluminum inner wrapping steel core structure, the holding part of the handle 10 is of an arc surface structure which accords with human engineering, the handle 10 is made of plastic or aluminum, and the interior of the handle is hollow and light, so that the aim of light weight design is fulfilled, the hand holding compactness is improved, and the fatigue feeling of operators is reduced; the integral structure of the airless manual spray gun is the prior art, and the difference lies in the improvement of the valve core assembly, which is not described in detail.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.